The Effects of A-site Doping on Crystal Structure, Microstructure and Electrical Properties of (Ba0.85Ca0.15) Zr0.1Ti0.9O3 Ceramics
Panupong Jaiban, Thanakrit Theethuan, Saryrung Khumtrong, Sirintra Lokakaew, Patharacha Kongchana and Anucha Watcharapasorn* Author for corresponding; e-mail address: panupongj@kmutnb.ac.th
Volume: Vol.49 No.4 (July 2022)
Research Article
DOI: https://doi.org/10.12982/CMJS.2022.074
Received: 17 March 2022, Revised: 14 May 2022, Accepted: 8 June 2022, Published: -
Citation: Jaiban P., Theethuan T., Khumtrong S., Lokakaew S., Kongchana P. and Watcharapasorn A., The Effects of A-site Doping on Crystal Structure, Microstructure and Electrical Properties of (Ba0.85Ca0.15) Zr0.1Ti0.9O3 Ceramics, Chiang Mai Journal of Science, 2022; 49(4): 1150-1163. DOI 10.12982/CMJS.2022.074.
Abstract
(Ba0.85Ca0.15) Zr0.1Ti0.9O3 (BCZT) ceramics with donor (La3+ and Bi3+ ions) and acceptor (Na+ ions) doping at the A-site were fabricated in this study. The effects of crystal structure, microstructure, and chemical defects on all samples’ dielectric properties and piezoelectric coefficient (d33) were observed. Bi3+ ions decreased grain size, decreased phase transition temperature, and caused the diffuse dielectric spectrum, resulting in a low d33 value. Na+ ions induced abnormal grain growth, leading to enhancement in maximum dielectric constant; meanwhile, the phase transition temperature increased. The d33 value of Na-doped BCZT was comparable with BCZT ceramic. The addition of La3+ ions increased the phase transition temperature and decreased grain size. The d33 value of La-doped BCZT was lower than BCZT ceramic. The result suggested that BCZT, BCZT-Na, and BCZT-La ceramics could be alternative materials for piezoelectric energy harvesting devices.